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INDONESIA
Jurnal Perlindungan Tanaman Indonesia
Published by Universitas Gadjah Mada
ISSN : 14101637     EISSN : 25484788     DOI : -
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
Arjuna Subject : -
Articles 509 Documents
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Catatan Singkat Penelitian Eksploratif Periode 1997 - 2002 Soeprapto Mangoendihardjo
Jurnal Perlindungan Tanaman Indonesia Vol 8, No 2 (2002)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jpti.12367

Abstract

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Evaluasi Manfaat Sekolah Lapang Pengendalian Hama Terpadu (SLPHT) Perkebunan Kopi Rakyat dalam Meningkatkan Pendapatan Petani Hendiarto Hendiarto
Jurnal Perlindungan Tanaman Indonesia Vol 13, No 2 (2007)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jpti.11857

Abstract

Integrated pest management (IPM) Farmers Field School (FFS) on coffee crop had been conducted in East Java since 1998 until 2003. The IPM-FFS program aimed to increase productivity and quality of the coffee bean through the improvement of the crop and the environment. The aim of this paper was to 1) describe the benefit of the implementation of IPM practicing farmers. The tabulation descriptive method, the profit function and logit function analysis were used. Results showed that the application of IPM technology could increase the profit and the quality of the coffee bean and the price of coffee at farmer level obviously affected the farmer to adopt IPM and increase the income of the farming.
Pengaruh Residu Karbofuran terhadap Penyakit Hawar Upih Daun Rhizoctonia solani pada Padi Christanti Sumardiyono
Jurnal Perlindungan Tanaman Indonesia Vol 3, No 2 (1997)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jpti.12960

Abstract

The purpose of this study was to know the side effect of carbofuran on sheath blight disease on rice caused by Rhizoctonia solani. The results showed that carbofuran residue which was maybe its metabolite decrease disease intensity of sheath blight. The carbofuran residue was detected on rice stem two months after treatment at the dose of 8.5, 17.0, and 34.0 kg/ha, while in the soil treated at 34.0 kg/ha it was not detected.
Isolasi dan Karakterisasi Β-1,3-Glukanase Akar Semai Tusam (Pinus merkusii Jungh. et de Vriese) yang Berasosiasi dengan Fungi Ektomikorisa M. D. Anggoro; S. M. Widyastuti; S. Margino
Jurnal Perlindungan Tanaman Indonesia Vol 11, No 2 (2005)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jpti.12086

Abstract

Association between tusam (Pinus merkusii Jungh. et de Vriese) seedling roots with ectomycorrhiza fungi was expected to increase the activity {β-1,3-glucanase level in the plants. This enzyme has potency to protect seedling from soil borne fungal pathogens by degrading the fungal cell walls. The objectives of this research were to isolate and characterize β-1,3-glucanase from tusam seedling roots associated with ectomycorrhiza fungi. Crude protein was isolated with ammonium sulfat precipitation and then purified by gel filtration chromatography and characterize molecular weight, temperature and pH for optimum the activity. The enzyme from tusam seedling roots associated with ectomycorrhizal fungi, designated as GLUC15 have 15 kD molecular weight, 30° - 40° C temperature and pH 5-7 for optimum activity.
Insect Biodiversity in Organic and Non-Organic Rice Ecosystem in The District of Bantul Eka Armi Ovawanda; Witjaksono Witjaksono; Y. Andi Trisyono
Jurnal Perlindungan Tanaman Indonesia Vol 20, No 1 (2016)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jpti.16619

Abstract

Measuring biodiversity of insects is an essential part in management concept of insect pest populations based on ecology. This study examined the index of insect biodiversity by measuring species richness, species evenness and heterogeneity in organic and non-organic rice farming ecosystem. The sampling was conducted during the planting season of April–May 2015 and October–November 2015 at 44, 52 and 66 days after rice transplanting (DAT). High number of species richness (7 to 13 species) was found in the non-organic rice field (April–May 2015). In contrast, high number of species richness (22 to 33 species) was found in the organic rice field (October–November 2015). The species evenness and heterogeneity in the organic farming were generally higher than these in the non-organic rice in the both of planting season April–May 2015 and October–November 2015. Overall, the organic rice farming ecosystem can increase species richness, species evenness and heterogeneity of insect. INTISARI Mengukur biodiversitas serangga adalah salah satu bagian penting dalam konsep pengelolaan populasi serangga hama berbasis ekologi. Penelitian ini mengkaji indeks biodiversitas serangga dengan mengukur kekayaan spesies (species richness), kemerataan spesies (species evenness), dan keanekaragaman/kelimpahan spesies (heterogenity) pada sistem budidaya padi organik dan non-organik. Pengambilan sampel diperoleh pada saat musim tanam April–Mei 2015 dan musim tanam Oktober–November 2015 di 44, 52, dan 66 hari setelah tanam. Total kekayaan spesies tertinggi (7–13 spesies) ditemukan di lahan padi non-organik (April–Mei 2015). Sebaliknya, total kekayaan spesies (22–33 spesies) ditemukan di lahan padi organik (Oktober–November 2015). Kemerataan spesies dan heterogenitas di lahan padi organik secara umum lebih tinggi dibanding di padi non-organik pada kedua musim tanam April–Mei 2015 dan Oktober–November 2015. Secara keseluruhan, sistem budidaya di ekosistem padi organik dapat meningkatkan kekayaan spesies, kemerataan spesies, dan heterogenitas serangga.
Keefektifan Steinernema spp. terhadap Spodoptera exigua F. X. Wagiman; B. Triman; Rr. Siti Astuti
Jurnal Perlindungan Tanaman Indonesia Vol 9, No 1 (2003)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jpti.12280

Abstract

Effectiveness of entomopathogenic nematodes Steinernema spp. against mortality of larvae and pupae of Spodoptera exigua Hubner (Lepidoptera: Noctuidae) was evaluated in the Laboratory of Nematology and Biological Control at the Faculty of Agriculture, Gadjah Mada University. The most virulent isolate of the nematode was selected amongst isolates from Solo, Jombang, and Medan. The effectiveness was determined by analising mortality of the S. exigua that was treated with Steinernema spp. at concentration rates of 0, 50, 100, 200, 400 infective juvenil (IJ) per 1.5 mL aquadest. Inoculation of the nematode was done by filter paper method. Results showed that all isolates were able to infect the third instar of S. exigua. Solo and Jombang isolates caused relative similar in mortalities ca. 98 and 94%, and significantly higher than Medan isolate ca. 86. Hence, the Solo isolate was preferred for efficacy against the insect larvae and pupae. The mortality of S. exigua due to the Steinernema spp. was influenced by the insect instars. The insect mortality-rates of L1, L2, and pupae were 13,3; 6.6 - 13,3; 23,3 - 60% and lower than those of L3, L4, and L5 ca. 41,6 - 75; 46,6 - 60; and 66,6 - 90%, respectively. The nematode concentration-rates did not influenced the mortality of L1, L2, L3, L4, and pupae but it significantly influenced the L5 mortality. The concentration rate of 200 IJ per 1.5 ml aquadest caused the highest mortality.
Pengaruh Konsentrasi dan Frekuensi Aplikasi Deltametrin terhadap Resurjensi Nilaparvata lugens Yuni Ratna; Y. Andi Trisyono; Witjaksono Witjaksono; Didik Indradewa
Jurnal Perlindungan Tanaman Indonesia Vol 16, No 1 (2010)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jpti.11737

Abstract

Nilaparvata lugens is the type of insect pest whose resurgence is induced by insecticides. Deltamethrin is an insecticide commonly used by farmers to control pests other than N. lugens on rice. This research was conducted to determine the effect of sublethal concentrations and application frequency of deltamethrin on subsequent growth and development of third instars of N. lugens. The selected concentrations were 50 ppm (LC25) and 225 ppm (LC50), and the frequency of applications ranged 1–3 times. Each concentration was applied to the third instars of the parent generation (one time), the parent and their first offspring (two times) and the parent, their first and second offspring (three times). N. lugens used in this experiment was the susceptible population derived from the laboratory population. Application of deltamethrin on two and three consecutive generations increased nymphal mortality, the population of offspring produced by the surviving adults, and the ratio of treated and control females in producing the offspring. Increasing the frequency of application increased the ratio, and the females received three applications produced nymphs 2.65 times more than the control females. The two sublethal concentrations did not have significant impact on the above parameters. Furthermore, the interaction between concentration and frequency of application was absent. These findings suggest that several applications of deltamethrin at sublethal concentrations would contribute to the resurgence of N. lugens.
Beberapa Catatan Mengenai Hama Baru: Penggulung Daun Teh Siput Tanpa Cangkang, Parmarion pupillaris Bambang Rahayu T. P.; Siwi Indarti; Tri Harjaka
Jurnal Perlindungan Tanaman Indonesia Vol 6, No 1 (2000)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jpti.12410

Abstract

In the past tea plantation at Pagilaran estate is attacked by leaf roller pests. These are Homona coffearia, Cydia leucostoma, and Gracilaria theifora. At present a slug Parmarion pupillaris is found and considered as a new leaf roller pest, because they live inside of the rolled leaf. This symptom is not known before. The population of Parmarion slug is high 3-4 slugs per bush of tea at the sub-division of Pagilaran estate of Pagilaran, Binorong and Garjito. This condition maybe supported by the weather that Pagilaran estate have a high rainfall of 4,842-6,067 mm per year with only 1-2 months of dry season.
Variabilitas Strain-Strain PStV pada Tingkat Molekul Berdasarkan Gen Protein Selubung dan 3' UTR (Untranslated Region) Genom RNA PStV Hasriadi Mat Akin; Sudarsono Sudarsono
Jurnal Perlindungan Tanaman Indonesia Vol 8, No 2 (2002)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jpti.12318

Abstract

Variability of various peanut stripe virus (PStV) strains at the molecular level was studied based on nucleotide sequence of coat protein (CP) cistron and 3' UTR (untranslated region). Six PStV strains causing different types of symptoms on peanut leaves (Arachis hypogaea var. Landak) were used in this study. Fourteen point mutations on the coat protein gene have been identified among the PStV strains, however, only two point mutations at three positions (9309 of PStV-lsb and PStV-lbs and 9885 of PStV-Ibs) resulted in amino acid residue changed of the coat protein. Pair comparison among six 3' UTR sequences of the strains revealed a 97.9 - 100% sequence similarity. The results provided evidence that all the strains were of the same virus and there is no correlation between typical symptoms of the PStV infection and CP sequence variability among the strains.
Penularan Penyakit Mosaik Kacang Panjang oleh Aphis craccivora Y. B. Sumardiyono; Supratoyo Supratoyo; Samsuri Samsuri
Jurnal Perlindungan Tanaman Indonesia Vol 3, No 1 (1997)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jpti.12905

Abstract

Transmission of cowpea mosaic disease (Vigna unguiculata (L.) Walp.) caused by Cowpea Aphid-borne Mosaic Virus (CAMV) through insect vector Aphis craccivora Koch was studied tn the laboratory and the field. Serial inoculation test in varied inoculation access period (1, 5, 10, and 15 minutes) was done to determine the retention time of virus. Field studies were undertaken to evaluate the effect of the number of initial inoculum and plant age on the disease progress. The results showed that viruliferous insect retained their inoculativity untill third series inoculation with 5, 10, and 15 minutes inoculation access period. lt indicated that the longest retention time was 45 minutes, and virus - insect relationship is non-persistent. The disease-spread changed with the number of initial inoculum and the age of the plant. The highest disease intensity of 97.92 per cent was observed in the plot with 2 diseased plants as inittal inoculum and the insects vectors were infested at 10 days plant of age. While the lowest was observed in the plot with one diseased plant as initial inoculum and infestation of insects vector at 30 days after planting.

Page 18 of 51 | Total Record : 509

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